The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2020
Filed:
Nov. 21, 2017
Yasumasa Oguma, Tokyo, JP;
Tetsuya Osaka, Tokyo, JP;
Shingo Tsuda, Tokyo, JP;
Kazuaki Utsumi, Tokyo, JP;
Tokihiko Yokoshima, Tokyo, JP;
Daikichi Mukoyama, Tokyo, JP;
Yasumasa Oguma, Tokyo, JP;
Tetsuya Osaka, Tokyo, JP;
Shingo Tsuda, Tokyo, JP;
Kazuaki Utsumi, Tokyo, JP;
Tokihiko Yokoshima, Tokyo, JP;
Daikichi Mukoyama, Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
WASEDA UNIVERSITY, Tokyo, JP;
Abstract
A battery state estimating apparatus is provided with: an acquirer configured to obtain a plurality of complex impedances of a battery at a plurality of different temperatures; a calculator configured to calculate a slope of a straight line connecting values of the obtained plurality of complex impedances at a first predetermined frequency on a complex plane having an axis that is a real component of the complex impedance and an axis that is an imaginary component of the complex impedance, as a slope of the complex impedance; a storage configured to store in advance a relation between the slope of the complex impedance and a battery state associated with the battery; and an estimator configured to estimate the battery state on the basis of the calculated slope of the complex impedance and the stored relation.